2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
10 #include <afs/param.h>
11 #include <afs/afs_args.h>
22 #include <rx_pthread.h>
24 #include <WINNT/syscfg.h>
25 #include <WINNT/afsreg.h>
26 #include <../afsrdr/kif.h>
28 /*extern void afsi_log(char *pattern, ...);*/
30 /* read/write lock for all global storage in this module */
31 osi_rwlock_t cm_callbackLock;
33 afs_int32 cm_OfflineROIsValid = 0;
35 #ifdef AFS_FREELANCE_CLIENT
36 extern osi_mutex_t cm_Freelance_Lock;
39 /* count of # of callback breaking messages received by this CM so far. We use
40 * this count in determining whether there have been any callback breaks that
41 * apply to a call that returned a new callback. If the counter doesn't
42 * increase during a call, then we know that no callbacks were broken during
43 * that call, and thus that the callback that was just returned is still valid.
45 long cm_callbackCount;
47 /* count of number of RPCs potentially returning a callback executing now.
48 * When this counter hits zero, we can clear out the racing revokes list, since
49 * at that time, we know that none of the just-executed callback revokes will
50 * apply to any future call that returns a callback (since the latter hasn't
51 * even started execution yet).
53 long cm_activeCallbackGrantingCalls;
55 /* list of callbacks that have been broken recently. If a call returning a
56 * callback is executing and a callback revoke runs immediately after it at the
57 * server, the revoke may end up being processed before the response to the
58 * original callback granting call. We detect this by keeping a list of
59 * callback revokes that have been received since we *started* the callback
60 * granting call, and discarding any callbacks received for the same file ID,
61 * even if the callback revoke was received before the callback grant.
63 cm_racingRevokes_t *cm_racingRevokesp;
65 /* record a (potentially) racing revoke for this file ID; null means for all
66 * file IDs, and is used by InitCallBackState.
68 * The cancelFlags describe whether we're just discarding callbacks for the same
69 * file ID, the same volume, or all from the same server.
71 * Called with no locks held.
73 void cm_RecordRacingRevoke(cm_fid_t *fidp, long cancelFlags)
75 cm_racingRevokes_t *rp;
77 lock_ObtainWrite(&cm_callbackLock);
79 osi_Log3(afsd_logp, "RecordRacingRevoke Volume %d Flags %lX activeCalls %d",
80 fidp ? fidp->volume : 0, cancelFlags, cm_activeCallbackGrantingCalls);
82 if (cm_activeCallbackGrantingCalls > 0) {
83 rp = malloc(sizeof(*rp));
84 memset(rp, 0, sizeof(*rp));
85 osi_QAdd((osi_queue_t **) &cm_racingRevokesp, &rp->q);
86 rp->flags |= (cancelFlags & CM_RACINGFLAG_ALL);
87 if (fidp) rp->fid = *fidp;
88 rp->callbackCount = ++cm_callbackCount;
90 lock_ReleaseWrite(&cm_callbackLock);
94 * When we lose a callback, may have to send change notification replies.
95 * Do not call with a lock on the scp.
97 void cm_CallbackNotifyChange(cm_scache_t *scp)
103 /* why does this have to query the registry each time? */
104 if (RegOpenKeyEx( HKEY_LOCAL_MACHINE,
105 AFSREG_CLT_OPENAFS_SUBKEY,
107 KEY_READ|KEY_QUERY_VALUE,
108 &hKey) == ERROR_SUCCESS) {
110 dummyLen = sizeof(DWORD);
111 RegQueryValueEx(hKey, "CallBack Notify Change Delay", NULL, NULL,
112 (BYTE *) &dwDelay, &dummyLen);
116 if (dwDelay > 5000) /* do not allow a delay of more then 5 seconds */
119 osi_Log3(afsd_logp, "CallbackNotifyChange FileType %d Flags %lX Delay %dms",
120 scp->fileType, scp->flags, dwDelay);
125 /* for directories, this sends a change notification on the dir itself */
126 if (scp->fileType == CM_SCACHETYPE_DIRECTORY) {
128 if (scp->flags & CM_SCACHEFLAG_ANYWATCH)
130 FILE_NOTIFY_GENERIC_DIRECTORY_FILTER,
131 scp, NULL, NULL, TRUE);
133 dc_break_callback(FID_HASH_FN(&scp->fid));
136 /* and for files, this sends a change notification on the file's parent dir */
140 tfid.cell = scp->fid.cell;
141 tfid.volume = scp->fid.volume;
142 tfid.vnode = scp->parentVnode;
143 tfid.unique = scp->parentUnique;
144 dscp = cm_FindSCache(&tfid);
147 dscp->flags & CM_SCACHEFLAG_ANYWATCH )
149 FILE_NOTIFY_GENERIC_FILE_FILTER,
150 dscp, NULL, NULL, TRUE);
153 dc_break_callback(FID_HASH_FN(&dscp->fid));
156 cm_ReleaseSCache(dscp);
160 /* called with no locks held for every file ID that is revoked directly by
161 * a callback revoke call. Does not have to handle volume callback breaks,
162 * since those have already been split out.
164 * The callp parameter is currently unused.
166 void cm_RevokeCallback(struct rx_call *callp, cm_cell_t * cellp, AFSFid *fidp)
172 /* don't bother setting cell, since we won't be checking it (to aid
173 * in working with multi-homed servers: we don't know the cell if we
174 * don't recognize the IP address).
177 tfid.volume = fidp->Volume;
178 tfid.vnode = fidp->Vnode;
179 tfid.unique = fidp->Unique;
180 hash = CM_SCACHE_HASH(&tfid);
182 osi_Log3(afsd_logp, "RevokeCallback vol %u vn %u uniq %u",
183 fidp->Volume, fidp->Vnode, fidp->Unique);
185 /* do this first, so that if we're executing a callback granting call
186 * at this moment, we kill it before it can be merged in. Otherwise,
187 * it could complete while we're doing the scan below, and get missed
188 * by both the scan and by this code.
190 cm_RecordRacingRevoke(&tfid, 0);
192 lock_ObtainWrite(&cm_scacheLock);
193 /* do all in the hash bucket, since we don't know how many we'll find with
196 for (scp = cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
197 if (scp->fid.volume == tfid.volume &&
198 scp->fid.vnode == tfid.vnode &&
199 scp->fid.unique == tfid.unique &&
200 (cellp == NULL || scp->fid.cell == cellp->cellID) &&
201 scp->cbExpires > 0 &&
202 scp->cbServerp != NULL)
204 cm_HoldSCacheNoLock(scp);
205 lock_ReleaseWrite(&cm_scacheLock);
206 osi_Log4(afsd_logp, "RevokeCallback Discarding SCache scp 0x%p vol %u vn %u uniq %u",
207 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
209 lock_ObtainMutex(&scp->mx);
210 cm_DiscardSCache(scp);
211 lock_ReleaseMutex(&scp->mx);
213 cm_CallbackNotifyChange(scp);
215 lock_ObtainWrite(&cm_scacheLock);
216 cm_ReleaseSCacheNoLock(scp);
219 lock_ReleaseWrite(&cm_scacheLock);
221 osi_Log3(afsd_logp, "RevokeCallback Complete vol %u vn %u uniq %u",
222 fidp->Volume, fidp->Vnode, fidp->Unique);
225 /* called to revoke a volume callback, which is typically issued when a volume
226 * is moved from one server to another.
228 * Called with no locks held.
230 void cm_RevokeVolumeCallback(struct rx_call *callp, cm_cell_t *cellp, AFSFid *fidp)
236 osi_Log1(afsd_logp, "RevokeVolumeCallback vol %d", fidp->Volume);
238 /* do this first, so that if we're executing a callback granting call
239 * at this moment, we kill it before it can be merged in. Otherwise,
240 * it could complete while we're doing the scan below, and get missed
241 * by both the scan and by this code.
243 tfid.cell = tfid.vnode = tfid.unique = 0;
244 tfid.volume = fidp->Volume;
245 cm_RecordRacingRevoke(&tfid, CM_RACINGFLAG_CANCELVOL);
247 lock_ObtainWrite(&cm_scacheLock);
248 for (hash = 0; hash < cm_data.scacheHashTableSize; hash++) {
249 for(scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
250 if (scp->fid.volume == fidp->Volume &&
251 (cellp == NULL || scp->fid.cell == cellp->cellID) &&
252 scp->cbExpires > 0 &&
253 scp->cbServerp != NULL) {
254 cm_HoldSCacheNoLock(scp);
255 lock_ReleaseWrite(&cm_scacheLock);
257 lock_ObtainMutex(&scp->mx);
258 osi_Log4(afsd_logp, "RevokeVolumeCallback Discarding SCache scp 0x%p vol %u vn %u uniq %u",
259 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
260 cm_DiscardSCache(scp);
261 lock_ReleaseMutex(&scp->mx);
263 cm_CallbackNotifyChange(scp);
264 lock_ObtainWrite(&cm_scacheLock);
265 cm_ReleaseSCacheNoLock(scp);
267 } /* search one hash bucket */
268 } /* search all hash buckets */
270 lock_ReleaseWrite(&cm_scacheLock);
272 osi_Log1(afsd_logp, "RevokeVolumeCallback Complete vol %d", fidp->Volume);
276 * afs_data_pointer_to_int32() - returns least significant afs_int32 of the
277 * given data pointer, without triggering "cast truncates pointer"
278 * warnings. We use this where we explicitly don't care whether a
279 * pointer is truncated -- it loses information where a pointer is
280 * larger than an afs_int32.
284 afs_data_pointer_to_int32(const void *p)
287 afs_int32 i32[sizeof(void *) / sizeof(afs_int32)];
291 int i32_sub; /* subscript of least significant afs_int32 in ip.i32[] */
296 /* used to determine the byte order of the system */
299 char c[sizeof(int) / sizeof(char)];
305 /* little-endian system */
308 /* big-endian system */
309 i32_sub = (sizeof ip.i32 / sizeof ip.i32[0]) - 1;
314 return ip.i32[i32_sub];
316 /*------------------------------------------------------------------------
317 * EXPORTED SRXAFSCB_CallBack
320 * Routine called by the server-side callback RPC interface to
321 * implement passing in callback information.
325 * rx_call : Ptr to Rx call on which this request came in.
326 * fidsArrayp : Ptr to array of fids involved.
327 * cbsArrayp : Ptr to matching callback info for the fids.
333 * Nothing interesting.
337 *------------------------------------------------------------------------*/
338 /* handle incoming RPC callback breaking message.
339 * Called with no locks held.
342 SRXAFSCB_CallBack(struct rx_call *callp, AFSCBFids *fidsArrayp, AFSCBs *cbsArrayp)
346 struct rx_connection *connp;
347 struct rx_peer *peerp;
348 unsigned long host = 0;
349 unsigned short port = 0;
350 cm_server_t *tsp = NULL;
351 cm_cell_t * cellp = NULL;
353 MUTEX_ENTER(&callp->lock);
355 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
356 host = rx_HostOf(peerp);
357 port = rx_PortOf(peerp);
359 tsp = cm_FindServerByIP(host, CM_SERVER_FILE);
364 osi_Log2(afsd_logp, "SRXAFSCB_CallBack from host 0x%x port %d",
368 for (i=0; i < (long) fidsArrayp->AFSCBFids_len; i++) {
369 tfidp = &fidsArrayp->AFSCBFids_val[i];
371 if (tfidp->Volume == 0)
372 continue; /* means don't do anything */
373 else if (tfidp->Vnode == 0)
374 cm_RevokeVolumeCallback(callp, cellp, tfidp);
376 cm_RevokeCallback(callp, cellp, tfidp);
379 MUTEX_EXIT(&callp->lock);
383 /*------------------------------------------------------------------------
384 * EXPORTED SRXAFSCB_InitCallBackState
387 * Routine called by the server-side callback RPC interface to
388 * implement clearing all callbacks from this host.
391 * rx_call : Ptr to Rx call on which this request came in.
397 * Nothing interesting.
401 *------------------------------------------------------------------------*/
402 /* called with no locks by RPC system when a server indicates that it has never
403 * heard from us, or for other reasons has had to discard callbacks from us
404 * without telling us, e.g. a network partition.
407 SRXAFSCB_InitCallBackState(struct rx_call *callp)
409 struct sockaddr_in taddr;
414 struct rx_connection *connp;
415 struct rx_peer *peerp;
416 unsigned long host = 0;
417 unsigned short port = 0;
419 MUTEX_ENTER(&callp->lock);
421 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
422 host = rx_HostOf(peerp);
423 port = rx_PortOf(peerp);
426 osi_Log2(afsd_logp, "SRXAFSCB_InitCallBackState from host 0x%x port %d",
430 if ((rx_ConnectionOf(callp)) && (rx_PeerOf(rx_ConnectionOf(callp)))) {
431 taddr.sin_family = AF_INET;
432 taddr.sin_addr.s_addr = rx_HostOf(rx_PeerOf(rx_ConnectionOf(callp)));
434 tsp = cm_FindServer(&taddr, CM_SERVER_FILE);
436 osi_Log1(afsd_logp, "Init Callback State server %x", tsp);
438 /* record the callback in the racing revokes structure. This
439 * shouldn't be necessary, since we shouldn't be making callback
440 * granting calls while we're going to get an initstate call,
441 * but there probably are some obscure races, so better safe
444 * We do this first since we don't hold the cm_scacheLock and vnode
445 * locks over the entire callback scan operation below. The
446 * big loop below is guaranteed to hit any callback already
447 * processed. The call to RecordRacingRevoke is guaranteed
448 * to kill any callback that is currently being returned.
449 * Anything that sneaks past both must start
450 * after the call to RecordRacingRevoke.
452 cm_RecordRacingRevoke(NULL, CM_RACINGFLAG_CANCELALL);
454 /* now search all vnodes looking for guys with this callback, if we
455 * found it, or guys with any callbacks, if we didn't find the server
456 * (that's how multihomed machines will appear and how we'll handle
457 * them, albeit a little inefficiently). That is, we're discarding all
458 * callbacks from all hosts if we get an initstate call from an unknown
459 * host. Since these calls are rare, and multihomed servers
460 * are "rare," hopefully this won't be a problem.
462 lock_ObtainWrite(&cm_scacheLock);
463 for (hash = 0; hash < cm_data.scacheHashTableSize; hash++) {
464 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
465 cm_HoldSCacheNoLock(scp);
466 lock_ReleaseWrite(&cm_scacheLock);
467 lock_ObtainMutex(&scp->mx);
469 if (scp->cbExpires > 0 && scp->cbServerp != NULL) {
470 /* we have a callback, now decide if we should clear it */
471 if (scp->cbServerp == tsp || tsp == NULL) {
472 osi_Log4(afsd_logp, "InitCallbackState Discarding SCache scp 0x%p vol %u vn %u uniq %u",
473 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
474 cm_DiscardSCache(scp);
478 lock_ReleaseMutex(&scp->mx);
480 cm_CallbackNotifyChange(scp);
481 lock_ObtainWrite(&cm_scacheLock);
482 cm_ReleaseSCacheNoLock(scp);
483 } /* search one hash bucket */
484 } /* search all hash buckets */
486 lock_ReleaseWrite(&cm_scacheLock);
489 /* reset the No flags on the server */
490 cm_SetServerNo64Bit(tsp, 0);
491 cm_SetServerNoInlineBulk(tsp, 0);
493 /* we're done with the server structure */
497 MUTEX_EXIT(&callp->lock);
501 /*------------------------------------------------------------------------
502 * EXPORTED SRXAFSCB_Probe
505 * Routine called by the server-side callback RPC interface to
506 * implement ``probing'' the Cache Manager, just making sure it's
510 * rx_call : Ptr to Rx call on which this request came in.
516 * Nothing interesting.
520 *------------------------------------------------------------------------*/
522 SRXAFSCB_Probe(struct rx_call *callp)
524 struct rx_connection *connp;
525 struct rx_peer *peerp;
526 unsigned long host = 0;
527 unsigned short port = 0;
529 MUTEX_ENTER(&callp->lock);
531 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
532 host = rx_HostOf(peerp);
533 port = rx_PortOf(peerp);
536 osi_Log2(afsd_logp, "SRXAFSCB_Probe from host 0x%x port %d",
540 MUTEX_EXIT(&callp->lock);
544 /*------------------------------------------------------------------------
545 * EXPORTED SRXAFSCB_GetLock
548 * Routine called by the server-side callback RPC interface to
549 * implement pulling out the contents of a lock in the lock
553 * a_call : Ptr to Rx call on which this request came in.
554 * a_index : Index of desired lock.
555 * a_result : Ptr to a buffer for the given lock.
558 * 0 if everything went fine,
559 * 1 if we were given a bad index.
562 * Nothing interesting.
566 *------------------------------------------------------------------------*/
567 /* debug interface */
569 extern osi_rwlock_t cm_aclLock;
570 extern osi_rwlock_t buf_globalLock;
571 extern osi_rwlock_t cm_callbackLock;
572 extern osi_rwlock_t cm_cellLock;
573 extern osi_rwlock_t cm_connLock;
574 extern osi_rwlock_t cm_daemonLock;
575 extern osi_rwlock_t cm_dnlcLock;
576 extern osi_rwlock_t cm_scacheLock;
577 extern osi_rwlock_t cm_serverLock;
578 extern osi_rwlock_t cm_userLock;
579 extern osi_rwlock_t cm_utilsLock;
580 extern osi_rwlock_t cm_volumeLock;
581 extern osi_rwlock_t smb_globalLock;
582 extern osi_rwlock_t smb_rctLock;
584 extern osi_mutex_t cm_Freelance_Lock;
585 extern osi_mutex_t cm_bufGetMutex;
586 extern osi_mutex_t cm_Afsdsbmt_Lock;
587 extern osi_mutex_t tokenEventLock;
588 extern osi_mutex_t smb_ListenerLock;
589 extern osi_mutex_t smb_RawBufLock;
590 extern osi_mutex_t smb_Dir_Watch_Lock;
592 #define LOCKTYPE_RW 1
593 #define LOCKTYPE_MUTEX 2
594 static struct _ltable {
599 {"cm_scacheLock", (char*)&cm_scacheLock, LOCKTYPE_RW},
600 {"buf_globalLock", (char*)&buf_globalLock, LOCKTYPE_RW},
601 {"cm_serverLock", (char*)&cm_serverLock, LOCKTYPE_RW},
602 {"cm_callbackLock", (char*)&cm_callbackLock, LOCKTYPE_RW},
603 {"cm_aclLock", (char*)&cm_aclLock, LOCKTYPE_RW},
604 {"cm_cellLock", (char*)&cm_cellLock, LOCKTYPE_RW},
605 {"cm_connLock", (char*)&cm_connLock, LOCKTYPE_RW},
606 {"cm_userLock", (char*)&cm_userLock, LOCKTYPE_RW},
607 {"cm_volumeLock", (char*)&cm_volumeLock, LOCKTYPE_RW},
608 {"cm_daemonLock", (char*)&cm_daemonLock, LOCKTYPE_RW},
609 {"cm_dnlcLock", (char*)&cm_dnlcLock, LOCKTYPE_RW},
610 {"cm_utilsLock", (char*)&cm_utilsLock, LOCKTYPE_RW},
611 {"smb_globalLock", (char*)&smb_globalLock, LOCKTYPE_RW},
612 {"smb_rctLock", (char*)&smb_rctLock, LOCKTYPE_RW},
613 {"cm_Freelance_Lock",(char*)&cm_Freelance_Lock, LOCKTYPE_MUTEX},
614 {"cm_bufGetMutex", (char*)&cm_bufGetMutex, LOCKTYPE_MUTEX},
615 {"cm_Afsdsbmt_Lock", (char*)&cm_Afsdsbmt_Lock, LOCKTYPE_MUTEX},
616 {"tokenEventLock", (char*)&tokenEventLock, LOCKTYPE_MUTEX},
617 {"smb_ListenerLock", (char*)&smb_ListenerLock, LOCKTYPE_MUTEX},
618 {"smb_RawBufLock", (char*)&smb_RawBufLock, LOCKTYPE_MUTEX},
619 {"smb_Dir_Watch_Lock",(char*)&smb_Dir_Watch_Lock, LOCKTYPE_MUTEX}
623 SRXAFSCB_GetLock(struct rx_call *callp, long index, AFSDBLock *lockp)
625 struct _ltable *tl; /*Ptr to lock table entry */
628 int nentries; /*Num entries in table */
629 int code; /*Return code */
630 struct rx_connection *connp;
631 struct rx_peer *peerp;
632 unsigned long host = 0;
633 unsigned short port = 0;
635 MUTEX_ENTER(&callp->lock);
637 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
638 host = rx_HostOf(peerp);
639 port = rx_PortOf(peerp);
642 osi_Log3(afsd_logp, "SRXAFSCB_GetLock(%d) from host 0x%x port %d",
643 index, ntohl(host), ntohs(port));
645 nentries = sizeof(ltable) / sizeof(struct _ltable);
646 if (index < 0 || index >= nentries) {
653 * Found it - copy out its contents.
656 strncpy(lockp->name, tl->name, sizeof(lockp->name));
657 lockp->name[sizeof(lockp->name)-1] = '\0';
658 lockp->lock.waitStates = 0;
659 switch ( tl->type ) {
661 rwp = (osi_rwlock_t *)tl->addr;
662 lockp->lock.exclLocked = rwp->flags;
663 lockp->lock.readersReading = rwp->readers;
664 lockp->lock.numWaiting = rwp->waiters;
667 mtxp = (osi_mutex_t *)tl->addr;
668 lockp->lock.exclLocked = mtxp->flags;
669 lockp->lock.readersReading = 0;
670 lockp->lock.numWaiting = mtxp->waiters;
673 lockp->lock.pid_last_reader = 0;
674 lockp->lock.pid_writer = 0;
675 lockp->lock.src_indicator = 0;
679 MUTEX_EXIT(&callp->lock);
683 /* debug interface */
685 SRXAFSCB_GetCE(struct rx_call *callp, long index, AFSDBCacheEntry *cep)
690 struct rx_connection *connp;
691 struct rx_peer *peerp;
692 unsigned long host = 0;
693 unsigned short port = 0;
695 MUTEX_ENTER(&callp->lock);
697 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
698 host = rx_HostOf(peerp);
699 port = rx_PortOf(peerp);
702 osi_Log2(afsd_logp, "SRXAFSCB_GetCE from host 0x%x port %d",
703 ntohl(host), ntohs(port));
705 lock_ObtainRead(&cm_scacheLock);
706 for (i = 0; i < cm_data.scacheHashTableSize; i++) {
707 for (scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp) {
711 } /*Zip through current hash chain */
712 } /*Zip through hash chains */
722 * Copy out the located entry.
724 memset(cep, 0, sizeof(AFSDBCacheEntry));
725 cep->addr = afs_data_pointer_to_int32(scp);
726 cep->cell = scp->fid.cell;
727 cep->netFid.Volume = scp->fid.volume;
728 cep->netFid.Vnode = scp->fid.vnode;
729 cep->netFid.Unique = scp->fid.unique;
730 cep->lock.waitStates = 0;
731 cep->lock.exclLocked = scp->mx.flags;
732 cep->lock.readersReading = 0;
733 cep->lock.numWaiting = scp->mx.waiters;
734 cep->lock.pid_last_reader = 0;
735 cep->lock.pid_writer = 0;
736 cep->lock.src_indicator = 0;
737 cep->Length = scp->length.LowPart;
738 cep->DataVersion = scp->dataVersion;
739 cep->callback = afs_data_pointer_to_int32(scp->cbServerp);
740 cep->cbExpires = scp->cbExpires;
741 cep->refCount = scp->refCount;
742 cep->opens = scp->openReads;
743 cep->writers = scp->openWrites;
744 switch (scp->fileType) {
745 case CM_SCACHETYPE_FILE:
748 case CM_SCACHETYPE_MOUNTPOINT:
751 case CM_SCACHETYPE_DIRECTORY:
752 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
757 case CM_SCACHETYPE_SYMLINK:
760 case CM_SCACHETYPE_DFSLINK:
763 case CM_SCACHETYPE_INVALID:
768 if (scp->flags & CM_SCACHEFLAG_STATD)
770 if (scp->flags & CM_SCACHEFLAG_RO || scp->flags & CM_SCACHEFLAG_PURERO)
772 if (scp->fileType == CM_SCACHETYPE_MOUNTPOINT &&
773 scp->mountPointStringp[0])
775 if (scp->flags & CM_SCACHEFLAG_WAITING)
780 * Return our results.
783 lock_ReleaseRead(&cm_scacheLock);
785 MUTEX_EXIT(&callp->lock);
789 /* debug interface */
791 SRXAFSCB_GetCE64(struct rx_call *callp, long index, AFSDBCacheEntry64 *cep)
796 struct rx_connection *connp;
797 struct rx_peer *peerp;
798 unsigned long host = 0;
799 unsigned short port = 0;
801 MUTEX_ENTER(&callp->lock);
803 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
804 host = rx_HostOf(peerp);
805 port = rx_PortOf(peerp);
808 osi_Log2(afsd_logp, "SRXAFSCB_GetCE64 from host 0x%x port %d",
809 ntohl(host), ntohs(port));
811 lock_ObtainRead(&cm_scacheLock);
812 for (i = 0; i < cm_data.scacheHashTableSize; i++) {
813 for (scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp) {
817 } /*Zip through current hash chain */
818 } /*Zip through hash chains */
828 * Copy out the located entry.
830 memset(cep, 0, sizeof(AFSDBCacheEntry64));
831 cep->addr = afs_data_pointer_to_int32(scp);
832 cep->cell = scp->fid.cell;
833 cep->netFid.Volume = scp->fid.volume;
834 cep->netFid.Vnode = scp->fid.vnode;
835 cep->netFid.Unique = scp->fid.unique;
836 cep->lock.waitStates = 0;
837 cep->lock.exclLocked = scp->mx.flags;
838 cep->lock.readersReading = 0;
839 cep->lock.numWaiting = scp->mx.waiters;
840 cep->lock.pid_last_reader = 0;
841 cep->lock.pid_writer = 0;
842 cep->lock.src_indicator = 0;
843 #if !defined(AFS_64BIT_ENV)
844 cep->Length.high = scp->length.HighPart;
845 cep->Length.low = scp->length.LowPart;
847 cep->Length = (afs_int64) scp->length.QuadPart;
849 cep->DataVersion = scp->dataVersion;
850 cep->callback = afs_data_pointer_to_int32(scp->cbServerp);
851 cep->cbExpires = scp->cbExpires;
852 cep->refCount = scp->refCount;
853 cep->opens = scp->openReads;
854 cep->writers = scp->openWrites;
855 switch (scp->fileType) {
856 case CM_SCACHETYPE_FILE:
859 case CM_SCACHETYPE_MOUNTPOINT:
862 case CM_SCACHETYPE_DIRECTORY:
863 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
868 case CM_SCACHETYPE_SYMLINK:
871 case CM_SCACHETYPE_DFSLINK:
874 case CM_SCACHETYPE_INVALID:
879 if (scp->flags & CM_SCACHEFLAG_STATD)
881 if (scp->flags & CM_SCACHEFLAG_RO || scp->flags & CM_SCACHEFLAG_PURERO)
883 if (scp->fileType == CM_SCACHETYPE_MOUNTPOINT &&
884 scp->mountPointStringp[0])
886 if (scp->flags & CM_SCACHEFLAG_WAITING)
891 * Return our results.
894 lock_ReleaseRead(&cm_scacheLock);
896 MUTEX_EXIT(&callp->lock);
900 /* debug interface: not implemented */
902 SRXAFSCB_XStatsVersion(struct rx_call *callp, long *vp)
904 struct rx_connection *connp;
905 struct rx_peer *peerp;
906 unsigned long host = 0;
907 unsigned short port = 0;
909 MUTEX_ENTER(&callp->lock);
911 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
912 host = rx_HostOf(peerp);
913 port = rx_PortOf(peerp);
916 osi_Log2(afsd_logp, "SRXAFSCB_XStatsVersion from host 0x%x port %d - not implemented",
917 ntohl(host), ntohs(port));
920 MUTEX_EXIT(&callp->lock);
924 /* debug interface: not implemented */
926 SRXAFSCB_GetXStats(struct rx_call *callp, long cvn, long coln, long *srvp, long *timep,
927 AFSCB_CollData *datap)
929 struct rx_connection *connp;
930 struct rx_peer *peerp;
931 unsigned long host = 0;
932 unsigned short port = 0;
934 MUTEX_ENTER(&callp->lock);
936 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
937 host = rx_HostOf(peerp);
938 port = rx_PortOf(peerp);
941 osi_Log2(afsd_logp, "SRXAFSCB_GetXStats from host 0x%x port %d - not implemented",
942 ntohl(host), ntohs(port));
944 MUTEX_EXIT(&callp->lock);
949 SRXAFSCB_InitCallBackState2(struct rx_call *callp, struct interfaceAddr* addr)
951 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState2 ->");
953 return SRXAFSCB_InitCallBackState(callp);
956 /* debug interface */
958 SRXAFSCB_WhoAreYou(struct rx_call *callp, struct interfaceAddr* addr)
961 int cm_noIPAddr; /* number of client network interfaces */
962 int cm_IPAddr[CM_MAXINTERFACE_ADDR]; /* client's IP address in host order */
963 int cm_SubnetMask[CM_MAXINTERFACE_ADDR];/* client's subnet mask in host order*/
964 int cm_NetMtu[CM_MAXINTERFACE_ADDR]; /* client's MTU sizes */
965 int cm_NetFlags[CM_MAXINTERFACE_ADDR]; /* network flags */
967 struct rx_connection *connp;
968 struct rx_peer *peerp;
969 unsigned long host = 0;
970 unsigned short port = 0;
972 MUTEX_ENTER(&callp->lock);
974 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
975 host = rx_HostOf(peerp);
976 port = rx_PortOf(peerp);
979 /* get network related info */
980 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
981 code = syscfg_GetIFInfo(&cm_noIPAddr,
982 cm_IPAddr, cm_SubnetMask,
983 cm_NetMtu, cm_NetFlags);
985 /* return all network interface addresses */
986 osi_Log2(afsd_logp, "SRXAFSCB_WhoAreYou from host 0x%x port %d",
990 addr->numberOfInterfaces = cm_noIPAddr;
991 addr->uuid = cm_data.Uuid;
992 for ( i=0; i < cm_noIPAddr; i++ ) {
993 addr->addr_in[i] = cm_IPAddr[i];
994 addr->subnetmask[i] = cm_SubnetMask[i];
995 addr->mtu[i] = (rx_mtu == -1 || (rx_mtu != -1 && cm_NetMtu[i] < rx_mtu)) ?
996 cm_NetMtu[i] : rx_mtu;
999 MUTEX_EXIT(&callp->lock);
1004 SRXAFSCB_InitCallBackState3(struct rx_call *callp, afsUUID* serverUuid)
1008 if (UuidToString((UUID *)serverUuid, &p) == RPC_S_OK) {
1009 osi_Log1(afsd_logp, "SRXAFSCB_InitCallBackState3 %s ->",p);
1012 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState3 - no server Uuid ->");
1014 return SRXAFSCB_InitCallBackState(callp);
1017 /* debug interface */
1019 SRXAFSCB_ProbeUuid(struct rx_call *callp, afsUUID* clientUuid)
1021 struct rx_connection *connp;
1022 struct rx_peer *peerp;
1023 unsigned long host = 0;
1024 unsigned short port = 0;
1028 MUTEX_ENTER(&callp->lock);
1030 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1031 host = rx_HostOf(peerp);
1032 port = rx_PortOf(peerp);
1035 if ( !afs_uuid_equal(&cm_data.Uuid, clientUuid) ) {
1036 UuidToString((UUID *)&cm_data.Uuid, &p);
1037 UuidToString((UUID *)clientUuid, &q);
1038 osi_Log4(afsd_logp, "SRXAFSCB_ProbeUuid %s != %s from host 0x%x port %d",
1039 osi_LogSaveString(afsd_logp,p),
1040 osi_LogSaveString(afsd_logp,q),
1046 code = 1; /* failure */
1048 osi_Log2(afsd_logp, "SRXAFSCB_ProbeUuid (success) from host 0x%x port %d",
1052 MUTEX_EXIT(&callp->lock);
1056 /* debug interface */
1058 SRXAFSCB_GetCellByNum(struct rx_call *callp, afs_int32 a_cellnum,
1059 char **a_name, serverList *a_hosts)
1063 cm_serverRef_t * serverRefp;
1064 struct rx_connection *connp;
1065 struct rx_peer *peerp;
1066 unsigned long host = 0;
1067 unsigned short port = 0;
1069 MUTEX_ENTER(&callp->lock);
1071 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1072 host = rx_HostOf(peerp);
1073 port = rx_PortOf(peerp);
1076 osi_Log3(afsd_logp, "SRXAFSCB_GetCellByNum(%d) from host 0x%x port %d",
1077 a_cellnum, ntohl(host), ntohs(port));
1079 a_hosts->serverList_val = 0;
1080 a_hosts->serverList_len = 0;
1082 cellp = cm_FindCellByID(a_cellnum);
1084 *a_name = strdup("");
1085 MUTEX_EXIT(&callp->lock);
1089 lock_ObtainRead(&cm_serverLock);
1090 *a_name = strdup(cellp->name);
1092 for ( sn = 0, serverRefp = cellp->vlServersp;
1093 sn < AFSMAXCELLHOSTS && serverRefp;
1094 sn++, serverRefp = serverRefp->next);
1096 a_hosts->serverList_len = sn;
1097 a_hosts->serverList_val = (afs_int32 *)osi_Alloc(sn * sizeof(afs_int32));
1099 for ( sn = 0, serverRefp = cellp->vlServersp;
1100 sn < AFSMAXCELLHOSTS && serverRefp;
1101 sn++, serverRefp = serverRefp->next)
1103 a_hosts->serverList_val[sn] = ntohl(serverRefp->server->addr.sin_addr.s_addr);
1106 lock_ReleaseRead(&cm_serverLock);
1107 MUTEX_EXIT(&callp->lock);
1111 /* debug interface */
1113 SRXAFSCB_TellMeAboutYourself( struct rx_call *callp,
1114 struct interfaceAddr *addr,
1115 Capabilities * capabilities)
1118 afs_int32 *dataBuffP;
1119 afs_int32 dataBytes;
1120 int cm_noIPAddr; /* number of client network interfaces */
1121 int cm_IPAddr[CM_MAXINTERFACE_ADDR]; /* client's IP address in host order */
1122 int cm_SubnetMask[CM_MAXINTERFACE_ADDR];/* client's subnet mask in host order*/
1123 int cm_NetMtu[CM_MAXINTERFACE_ADDR]; /* client's MTU sizes */
1124 int cm_NetFlags[CM_MAXINTERFACE_ADDR]; /* network flags */
1126 struct rx_connection *connp;
1127 struct rx_peer *peerp;
1128 unsigned long host = 0;
1129 unsigned short port = 0;
1131 MUTEX_ENTER(&callp->lock);
1133 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1134 host = rx_HostOf(peerp);
1135 port = rx_PortOf(peerp);
1138 /* get network related info */
1139 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
1140 code = syscfg_GetIFInfo(&cm_noIPAddr,
1141 cm_IPAddr, cm_SubnetMask,
1142 cm_NetMtu, cm_NetFlags);
1144 osi_Log2(afsd_logp, "SRXAFSCB_TellMeAboutYourself from host 0x%x port %d",
1148 /* return all network interface addresses */
1149 addr->numberOfInterfaces = cm_noIPAddr;
1150 addr->uuid = cm_data.Uuid;
1151 for ( i=0; i < cm_noIPAddr; i++ ) {
1152 addr->addr_in[i] = cm_IPAddr[i];
1153 addr->subnetmask[i] = cm_SubnetMask[i];
1154 addr->mtu[i] = (rx_mtu == -1 || (rx_mtu != -1 && cm_NetMtu[i] < rx_mtu)) ?
1155 cm_NetMtu[i] : rx_mtu;
1158 dataBytes = 1 * sizeof(afs_int32);
1159 dataBuffP = (afs_int32 *) osi_Alloc(dataBytes);
1160 dataBuffP[0] = CLIENT_CAPABILITY_ERRORTRANS;
1161 capabilities->Capabilities_len = dataBytes / sizeof(afs_int32);
1162 capabilities->Capabilities_val = dataBuffP;
1164 MUTEX_EXIT(&callp->lock);
1168 /*------------------------------------------------------------------------
1169 * EXPORTED SRXAFSCB_GetServerPrefs
1172 * Routine to list server preferences used by this client.
1175 * a_call : Ptr to Rx call on which this request came in.
1176 * a_index : Input server index
1177 * a_srvr_addr : Output server address (0xffffffff on last server)
1178 * a_srvr_rank : Output server rank
1184 * Nothing interesting.
1188 *------------------------------------------------------------------------*/
1190 int SRXAFSCB_GetServerPrefs(
1191 struct rx_call *callp,
1193 afs_int32 *a_srvr_addr,
1194 afs_int32 *a_srvr_rank)
1196 struct rx_connection *connp;
1197 struct rx_peer *peerp;
1198 unsigned long host = 0;
1199 unsigned short port = 0;
1201 MUTEX_ENTER(&callp->lock);
1203 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1204 host = rx_HostOf(peerp);
1205 port = rx_PortOf(peerp);
1208 osi_Log2(afsd_logp, "SRXAFSCB_GetServerPrefs from host 0x%x port %d - not implemented",
1212 *a_srvr_addr = 0xffffffff;
1213 *a_srvr_rank = 0xffffffff;
1215 MUTEX_EXIT(&callp->lock);
1219 /*------------------------------------------------------------------------
1220 * EXPORTED SRXAFSCB_GetCellServDB
1223 * Routine to list cells configured for this client
1226 * a_call : Ptr to Rx call on which this request came in.
1227 * a_index : Input cell index
1228 * a_name : Output cell name ("" on last cell)
1229 * a_hosts : Output cell database servers
1235 * Nothing interesting.
1239 *------------------------------------------------------------------------*/
1241 int SRXAFSCB_GetCellServDB(struct rx_call *callp, afs_int32 index, char **a_name,
1242 serverList *a_hosts)
1245 struct rx_connection *connp;
1246 struct rx_peer *peerp;
1247 unsigned long host = 0;
1248 unsigned short port = 0;
1250 MUTEX_ENTER(&callp->lock);
1252 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1253 host = rx_HostOf(peerp);
1254 port = rx_PortOf(peerp);
1257 osi_Log2(afsd_logp, "SRXAFSCB_GetCellServDB from host 0x%x port %d - not implemented",
1258 ntohl(host), ntohs(port));
1260 t_name = (char *)malloc(AFSNAMEMAX);
1263 a_hosts->serverList_len = 0;
1265 MUTEX_EXIT(&callp->lock);
1269 /*------------------------------------------------------------------------
1270 * EXPORTED SRXAFSCB_GetLocalCell
1273 * Routine to return name of client's local cell
1276 * a_call : Ptr to Rx call on which this request came in.
1277 * a_name : Output cell name
1283 * Nothing interesting.
1287 *------------------------------------------------------------------------*/
1289 int SRXAFSCB_GetLocalCell(struct rx_call *callp, char **a_name)
1292 struct rx_connection *connp;
1293 struct rx_peer *peerp;
1294 unsigned long host = 0;
1295 unsigned short port = 0;
1297 MUTEX_ENTER(&callp->lock);
1299 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1300 host = rx_HostOf(peerp);
1301 port = rx_PortOf(peerp);
1304 osi_Log2(afsd_logp, "SRXAFSCB_GetLocalCell from host 0x%x port %d",
1305 ntohl(host), ntohs(port));
1307 if (cm_data.rootCellp) {
1308 t_name = (char *)malloc(strlen(cm_data.rootCellp->name)+1);
1309 strcpy(t_name, cm_data.rootCellp->name);
1311 t_name = (char *)malloc(1);
1316 MUTEX_EXIT(&callp->lock);
1322 * afs_MarshallCacheConfig - marshall client cache configuration
1326 * IN callerVersion - the rpc stat version of the caller.
1328 * IN config - client cache configuration.
1330 * OUT ptr - buffer where configuration is marshalled.
1336 static void afs_MarshallCacheConfig(
1337 afs_uint32 callerVersion,
1338 cm_initparams_v1 *config,
1342 * We currently only support version 1.
1344 *(ptr++) = config->nChunkFiles;
1345 *(ptr++) = config->nStatCaches;
1346 *(ptr++) = config->nDataCaches;
1347 *(ptr++) = config->nVolumeCaches;
1348 *(ptr++) = config->firstChunkSize;
1349 *(ptr++) = config->otherChunkSize;
1350 *(ptr++) = config->cacheSize;
1351 *(ptr++) = config->setTime;
1352 *(ptr++) = config->memCache;
1357 /*------------------------------------------------------------------------
1358 * EXPORTED SRXAFSCB_GetCacheConfig
1361 * Routine to return parameters used to initialize client cache.
1362 * Client may request any format version. Server may not return
1363 * format version greater than version requested by client.
1366 * a_call: Ptr to Rx call on which this request came in.
1367 * callerVersion: Data format version desired by the client.
1368 * serverVersion: Data format version of output data.
1369 * configCount: Number bytes allocated for output data.
1370 * config: Client cache configuration.
1376 * Nothing interesting.
1380 *------------------------------------------------------------------------*/
1382 int SRXAFSCB_GetCacheConfig(struct rx_call *callp,
1383 afs_uint32 callerVersion,
1384 afs_uint32 *serverVersion,
1385 afs_uint32 *configCount,
1386 cacheConfig *config)
1388 afs_uint32 *t_config;
1390 extern cm_initparams_v1 cm_initParams;
1391 struct rx_connection *connp;
1392 struct rx_peer *peerp;
1393 unsigned long host = 0;
1394 unsigned short port = 0;
1396 MUTEX_ENTER(&callp->lock);
1398 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1399 host = rx_HostOf(peerp);
1400 port = rx_PortOf(peerp);
1403 osi_Log2(afsd_logp, "SRXAFSCB_GetCacheConfig from host 0x%x port %d - version 1 only",
1404 ntohl(host), ntohs(port));
1407 * Currently only support version 1
1409 allocsize = sizeof(cm_initparams_v1);
1410 t_config = (afs_uint32 *)malloc(allocsize);
1412 afs_MarshallCacheConfig(callerVersion, &cm_initParams, t_config);
1414 *serverVersion = AFS_CLIENT_RETRIEVAL_FIRST_EDITION;
1417 #define SIZE_MAX UINT_MAX
1419 osi_assertx(allocsize < SIZE_MAX, "allocsize >= SIZE_MAX");
1421 *configCount = (afs_uint32)allocsize;
1422 config->cacheConfig_val = t_config;
1423 config->cacheConfig_len = (*configCount)/sizeof(afs_uint32);
1425 MUTEX_EXIT(&callp->lock);
1429 /* called by afsd without any locks to initialize this module */
1430 void cm_InitCallback(void)
1432 lock_InitializeRWLock(&cm_callbackLock, "cm_callbackLock");
1433 cm_activeCallbackGrantingCalls = 0;
1436 /* called with locked scp; tells us whether we've got a callback.
1437 * Expirations are checked by a background daemon so as to make
1438 * this function as inexpensive as possible
1440 int cm_HaveCallback(cm_scache_t *scp)
1442 #ifdef AFS_FREELANCE_CLIENT
1443 // yj: we handle callbacks specially for callbacks on the root directory
1444 // Since it's local, we almost always say that we have callback on it
1445 // The only time we send back a 0 is if we're need to initialize or
1446 // reinitialize the fake directory
1448 // There are 2 state variables cm_fakeGettingCallback and cm_fakeDirCallback
1449 // cm_fakeGettingCallback is 1 if we're in the process of initialization and
1450 // hence should return false. it's 0 otherwise
1451 // cm_fakeDirCallback is 0 if we haven't loaded the fake directory, it's 1
1452 // if the fake directory is loaded and this is the first time cm_HaveCallback
1453 // is called since then. We return false in this case to allow cm_GetCallback
1454 // to be called because cm_GetCallback has some initialization work to do.
1455 // If cm_fakeDirCallback is 2, then it means that the fake directory is in
1456 // good shape and we simply return true, provided no change is detected.
1459 if (cm_freelanceEnabled &&
1460 scp->fid.cell==AFS_FAKE_ROOT_CELL_ID && scp->fid.volume==AFS_FAKE_ROOT_VOL_ID) {
1461 /* if it's something on /afs */
1462 if (!(scp->fid.vnode==0x1 && scp->fid.unique==0x1)) {
1463 /* if it's not root.afs */
1467 lock_ObtainMutex(&cm_Freelance_Lock);
1468 fdc = cm_fakeDirCallback;
1469 fgc = cm_fakeGettingCallback;
1470 lock_ReleaseMutex(&cm_Freelance_Lock);
1472 if (fdc==1) { // first call since init
1474 } else if (fdc==2 && !fgc) { // we're in good shape
1475 if (cm_getLocalMountPointChange()) { // check for changes
1476 cm_clearLocalMountPointChange(); // clear the changefile
1477 lock_ReleaseMutex(&scp->mx); // this is re-locked in reInitLocalMountPoints
1478 cm_reInitLocalMountPoints(); // start reinit
1479 lock_ObtainMutex(&scp->mx); // now get the lock back
1482 return 1; // no change
1488 if (scp->cbServerp != NULL) {
1490 } else if (cm_OfflineROIsValid) {
1491 switch (cm_GetVolumeStatus(scp->volp, scp->fid.volume)) {
1504 /* need to detect a broken callback that races with our obtaining a callback.
1505 * Need to be able to do this even if we don't know the file ID of the file
1506 * we're breaking the callback on at the time we start the acquisition of the
1507 * callback (as in the case where we are creating a file).
1509 * So, we start by writing down the count of the # of callbacks we've received
1510 * so far, and bumping a global counter of the # of callback granting calls
1511 * outstanding (all done under cm_callbackLock).
1513 * When we're back from the call, we look at all of the callback revokes with
1514 * counter numbers greater than the one we recorded in our caller's structure,
1515 * and replay those that are higher than when we started the call.
1517 * We free all the structures in the queue when the count of the # of outstanding
1518 * callback-granting calls drops to zero.
1520 * We call this function with the scp locked, too, but in its current implementation,
1521 * this knowledge is not used.
1523 void cm_StartCallbackGrantingCall(cm_scache_t *scp, cm_callbackRequest_t *cbrp)
1525 lock_ObtainWrite(&cm_callbackLock);
1526 cbrp->callbackCount = cm_callbackCount;
1527 cm_activeCallbackGrantingCalls++;
1528 cbrp->startTime = osi_Time();
1529 cbrp->serverp = NULL;
1530 lock_ReleaseWrite(&cm_callbackLock);
1533 /* Called at the end of a callback-granting call, to remove the callback
1534 * info from the scache entry, if necessary.
1536 * Called with scp locked, so we can discard the callbacks easily with
1537 * this locking hierarchy.
1539 void cm_EndCallbackGrantingCall(cm_scache_t *scp, cm_callbackRequest_t *cbrp,
1540 AFSCallBack *cbp, long flags)
1542 cm_racingRevokes_t *revp; /* where we are */
1543 cm_racingRevokes_t *nrevp; /* where we'll be next */
1545 cm_server_t * serverp = NULL;
1548 lock_ObtainWrite(&cm_callbackLock);
1549 if (flags & CM_CALLBACK_MAINTAINCOUNT) {
1550 osi_assertx(cm_activeCallbackGrantingCalls > 0,
1551 "CM_CALLBACK_MAINTAINCOUNT && cm_activeCallbackGrantingCalls == 0");
1554 osi_assertx(cm_activeCallbackGrantingCalls-- > 0,
1555 "!CM_CALLBACK_MAINTAINCOUNT && cm_activeCallbackGrantingCalls == 0");
1557 if (cm_activeCallbackGrantingCalls == 0)
1562 /* record the callback; we'll clear it below if we really lose it */
1565 if (scp->cbServerp != cbrp->serverp) {
1566 serverp = scp->cbServerp;
1568 cm_GetServer(cbrp->serverp);
1569 scp->cbServerp = cbrp->serverp;
1572 serverp = cbrp->serverp;
1574 scp->cbExpires = cbrp->startTime + cbp->ExpirationTime;
1577 serverp = cbrp->serverp;
1580 cbrp->serverp = NULL;
1583 /* a callback was actually revoked during our granting call, so
1584 * run down the list of revoked fids, looking for ours.
1585 * If activeCallbackGrantingCalls is zero, free the elements, too.
1587 * May need to go through entire list just to do the freeing.
1589 for (revp = cm_racingRevokesp; revp; revp = nrevp) {
1590 nrevp = (cm_racingRevokes_t *) osi_QNext(&revp->q);
1591 /* if this callback came in later than when we started the
1592 * callback-granting call, and if this fid is the right fid,
1593 * then clear the callback.
1595 if (scp && cbrp && cbrp->callbackCount != cm_callbackCount
1596 && revp->callbackCount > cbrp->callbackCount
1597 && (( scp->fid.volume == revp->fid.volume &&
1598 scp->fid.vnode == revp->fid.vnode &&
1599 scp->fid.unique == revp->fid.unique)
1601 ((revp->flags & CM_RACINGFLAG_CANCELVOL) &&
1602 scp->fid.volume == revp->fid.volume)
1604 (revp->flags & CM_RACINGFLAG_CANCELALL))) {
1605 /* this one matches */
1607 "Racing revoke scp 0x%p old cbc %d rev cbc %d cur cbc %d",
1609 cbrp->callbackCount, revp->callbackCount,
1617 /* if we freed the list, zap the pointer to it */
1619 cm_racingRevokesp = NULL;
1621 lock_ReleaseWrite(&cm_callbackLock);
1624 cm_DiscardSCache(scp);
1625 lock_ReleaseMutex(&scp->mx);
1626 cm_CallbackNotifyChange(scp);
1627 lock_ObtainMutex(&scp->mx);
1631 lock_ObtainWrite(&cm_serverLock);
1632 cm_FreeServer(serverp);
1633 lock_ReleaseWrite(&cm_serverLock);
1637 /* if flags is 1, we want to force the code to make one call, anyway.
1638 * called with locked scp; returns with same.
1640 long cm_GetCallback(cm_scache_t *scp, struct cm_user *userp,
1641 struct cm_req *reqp, long flags)
1644 cm_conn_t *connp = NULL;
1645 AFSFetchStatus afsStatus;
1647 AFSCallBack callback;
1649 cm_callbackRequest_t cbr;
1652 struct rx_connection * callp = NULL;
1653 int syncop_done = 0;
1655 osi_Log4(afsd_logp, "GetCallback scp 0x%p cell %d vol %d flags %lX",
1656 scp, scp->fid.cell, scp->fid.volume, flags);
1658 #ifdef AFS_FREELANCE_CLIENT
1659 // The case where a callback is needed on /afs is handled
1660 // specially. We need to fetch the status by calling
1661 // cm_MergeStatus and mark that cm_fakeDirCallback is 2
1662 if (cm_freelanceEnabled) {
1663 if (scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
1664 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID &&
1665 scp->fid.unique==0x1 &&
1666 scp->fid.vnode==0x1) {
1668 // Start by indicating that we're in the process
1669 // of fetching the callback
1670 lock_ObtainMutex(&cm_Freelance_Lock);
1671 osi_Log0(afsd_logp,"cm_getGetCallback fakeGettingCallback=1");
1672 cm_fakeGettingCallback = 1;
1673 lock_ReleaseMutex(&cm_Freelance_Lock);
1675 // Fetch the status info
1676 cm_MergeStatus(NULL, scp, &afsStatus, &volSync, userp, 0);
1678 // Indicate that the callback is not done
1679 lock_ObtainMutex(&cm_Freelance_Lock);
1680 osi_Log0(afsd_logp,"cm_getGetCallback fakeDirCallback=2");
1681 cm_fakeDirCallback = 2;
1683 // Indicate that we're no longer fetching the callback
1684 osi_Log0(afsd_logp,"cm_getGetCallback fakeGettingCallback=0");
1685 cm_fakeGettingCallback = 0;
1686 lock_ReleaseMutex(&cm_Freelance_Lock);
1691 if (scp->fid.cell==AFS_FAKE_ROOT_CELL_ID && scp->fid.volume==AFS_FAKE_ROOT_VOL_ID) {
1692 osi_Log0(afsd_logp,"cm_getcallback should NEVER EVER get here... ");
1695 #endif /* AFS_FREELANCE_CLIENT */
1697 mustCall = (flags & 1);
1698 cm_AFSFidFromFid(&tfid, &scp->fid);
1700 if (!mustCall && cm_HaveCallback(scp))
1703 /* turn off mustCall, since it has now forced us past the check above */
1706 /* otherwise, we have to make an RPC to get the status */
1708 code = cm_SyncOp(scp, NULL, userp, reqp, 0,
1709 CM_SCACHESYNC_FETCHSTATUS | CM_SCACHESYNC_GETCALLBACK);
1714 cm_StartCallbackGrantingCall(scp, &cbr);
1716 lock_ReleaseMutex(&scp->mx);
1718 /* now make the RPC */
1719 osi_Log4(afsd_logp, "CALL FetchStatus scp 0x%p vol %u vn %u uniq %u",
1720 scp, sfid.volume, sfid.vnode, sfid.unique);
1722 code = cm_ConnFromFID(&sfid, userp, reqp, &connp);
1726 callp = cm_GetRxConn(connp);
1727 code = RXAFS_FetchStatus(callp, &tfid,
1728 &afsStatus, &callback, &volSync);
1729 rx_PutConnection(callp);
1731 } while (cm_Analyze(connp, userp, reqp, &sfid, &volSync, NULL,
1733 code = cm_MapRPCError(code, reqp);
1735 osi_Log4(afsd_logp, "CALL FetchStatus FAILURE code 0x%x scp 0x%p vol %u vn %u",
1736 code, scp, scp->fid.volume, scp->fid.vnode);
1738 osi_Log4(afsd_logp, "CALL FetchStatus SUCCESS scp 0x%p vol %u vn %u uniq %u",
1739 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1741 lock_ObtainMutex(&scp->mx);
1743 cm_EndCallbackGrantingCall(scp, &cbr, &callback, 0);
1744 cm_MergeStatus(NULL, scp, &afsStatus, &volSync, userp, 0);
1746 cm_EndCallbackGrantingCall(NULL, &cbr, NULL, 0);
1749 /* if we got an error, return to caller */
1755 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_FETCHSTATUS | CM_SCACHESYNC_GETCALLBACK);
1758 osi_Log2(afsd_logp, "GetCallback Failed code 0x%x scp 0x%p -->",code, scp);
1759 osi_Log4(afsd_logp, " cell %u vol %u vn %u uniq %u",
1760 scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1762 osi_Log3(afsd_logp, "GetCallback Complete scp 0x%p cell %d vol %d",
1763 scp, scp->fid.cell, scp->fid.volume);
1770 /* called with cm_scacheLock held */
1771 long cm_CBServersUp(cm_scache_t *scp, time_t * downTime)
1773 cm_vol_state_t *statep;
1774 cm_volume_t * volp = scp->volp;
1775 afs_uint32 volID = scp->fid.volume;
1776 cm_serverRef_t *tsrp;
1781 if (scp->cbServerp == NULL)
1784 if (volp->rw.ID == volID) {
1786 } else if (volp->ro.ID == volID) {
1788 } else if (volp->bk.ID == volID) {
1792 if (statep->state == vl_online)
1795 for (found = 0,tsrp = statep->serversp; tsrp; tsrp=tsrp->next) {
1796 if (tsrp->server == scp->cbServerp)
1798 if (tsrp->server->downTime > *downTime)
1799 *downTime = tsrp->server->downTime;
1802 /* if the cbServerp does not match the current volume server list
1803 * we report the callback server as up so the callback can be
1806 return(found ? 0 : 1);
1809 /* called periodically by cm_daemon to shut down use of expired callbacks */
1810 void cm_CheckCBExpiration(void)
1814 time_t now, downTime;
1816 osi_Log0(afsd_logp, "CheckCBExpiration");
1819 lock_ObtainWrite(&cm_scacheLock);
1820 for (i=0; i<cm_data.scacheHashTableSize; i++) {
1821 for (scp = cm_data.scacheHashTablep[i]; scp; scp=scp->nextp) {
1823 if (scp->cbServerp && scp->cbExpires > 0 && now > scp->cbExpires &&
1824 (cm_CBServersUp(scp, &downTime) || downTime == 0 || downTime >= scp->cbExpires))
1826 cm_HoldSCacheNoLock(scp);
1827 lock_ReleaseWrite(&cm_scacheLock);
1829 osi_Log4(afsd_logp, "Callback Expiration Discarding SCache scp 0x%p vol %u vn %u uniq %u",
1830 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1831 lock_ObtainMutex(&scp->mx);
1832 cm_DiscardSCache(scp);
1833 lock_ReleaseMutex(&scp->mx);
1834 cm_CallbackNotifyChange(scp);
1836 cm_ReleaseSCacheNoLock(scp);
1837 lock_ObtainWrite(&cm_scacheLock);
1841 lock_ReleaseWrite(&cm_scacheLock);
1843 osi_Log0(afsd_logp, "CheckCBExpiration Complete");
1848 cm_GiveUpAllCallbacks(cm_server_t *tsp, afs_int32 markDown)
1852 struct rx_connection * rxconnp;
1854 if ((tsp->type == CM_SERVER_FILE) && !(tsp->flags & CM_SERVERFLAG_DOWN))
1856 code = cm_ConnByServer(tsp, cm_rootUserp, &connp);
1858 rxconnp = cm_GetRxConn(connp);
1859 rx_SetConnDeadTime(rxconnp, 10);
1860 code = RXAFS_GiveUpAllCallBacks(rxconnp);
1861 rx_SetConnDeadTime(rxconnp, ConnDeadtimeout);
1862 rx_PutConnection(rxconnp);
1866 cm_server_vols_t * tsrvp;
1870 lock_ObtainMutex(&tsp->mx);
1871 if (!(tsp->flags & CM_SERVERFLAG_DOWN)) {
1872 tsp->flags |= CM_SERVERFLAG_DOWN;
1873 tsp->downTime = osi_Time();
1875 cm_ForceNewConnections(tsp);
1876 lock_ReleaseMutex(&tsp->mx);
1878 /* Now update the volume status */
1879 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
1880 for (i=0; i<NUM_SERVER_VOLS; i++) {
1881 if (tsrvp->ids[i] != 0) {
1886 code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
1887 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
1889 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
1900 cm_GiveUpAllCallbacksAllServers(afs_int32 markDown)
1904 lock_ObtainWrite(&cm_serverLock);
1905 for (tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
1906 cm_GetServerNoLock(tsp);
1907 lock_ReleaseWrite(&cm_serverLock);
1908 cm_GiveUpAllCallbacks(tsp, markDown);
1909 lock_ObtainWrite(&cm_serverLock);
1910 cm_PutServerNoLock(tsp);
1912 lock_ReleaseWrite(&cm_serverLock);